From: "Gerd Möllmann" <gerd.moellmann@gmail.com>
To: Andrea Corallo <akrl@sdf.org>
Cc: Lars Ingebrigtsen <larsi@gnus.org>,
Lars Tveito <larstvei@ifi.uio.no>,
57957@debbugs.gnu.org, Stefan Monnier <monnier@iro.umontreal.ca>
Subject: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
Date: Thu, 22 Sep 2022 18:41:04 +0200 [thread overview]
Message-ID: <m2y1ubgy5b.fsf@Mini.fritz.box> (raw)
In-Reply-To: <xjf1qs3bdfa.fsf@ma.sdf.org> (Andrea Corallo's message of "Thu, 22 Sep 2022 16:07:37 +0000")
Andrea Corallo <akrl@sdf.org> writes:
>>>>From Common Lisp I can say that these functions expect a "tree",
>> i.e. not a circular list.
>
> Okay I tried an adhoc substitute but this is not the only place in the
> compiler not robust against cyclic lists, so more work will be needed.
The question is of course also how much effort circular lists deserve in
the compiler. From my point of view, not too much because they aren't
very useful, in code at least. And dealing with them costs runtime.
Maybe some places could use cl-list-length? That function deals with
circular lists and returns nil then. We could then refuse to compile.
next prev parent reply other threads:[~2022-09-22 16:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 7:55 bug#57957: 29.0.50; Native compilation hangs on cyclic lists Lars Tveito
2022-09-20 15:33 ` Lars Ingebrigtsen
2022-09-21 19:18 ` Andrea Corallo
2022-09-22 11:15 ` Lars Ingebrigtsen
2022-09-22 12:06 ` Gerd Möllmann
2022-09-22 16:07 ` Andrea Corallo
2022-09-22 16:41 ` Gerd Möllmann [this message]
2022-09-22 17:10 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-22 22:39 ` Andrea Corallo
2024-03-24 11:26 ` bug#57957: bug#69872: 29.2; Async native compilation of seq.el test uses up resources and hangs Andrea Corallo
2024-04-01 20:46 ` Andrea Corallo
2022-09-25 10:02 ` bug#57957: 29.0.50; Native compilation hangs on cyclic lists Basil L. Contovounesios via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-22 14:25 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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